Cruising Revs

[The Garfish]

Originally Posted by jwalker

There does seem to be something wrong with your figures

dats cuz heez ann irysh nobbur yew jokkstrapp

de bastuds orlwaiys ad a bitt ov trubbul werkin owt de ekschaynj rait wen yew payd dem in pownd nowtes insted ov punnts

dis bitt ov trubbul endid upp wiv yew ownly gettin 90 pense forr yorr pownd

dis iz wot yew wud corl 10% slipp

gaRf

[Nasher]

Originally Posted by jwalker

Feck, reading this thread, it's easy to see why. GaRfie is the brainiest bloke here!

Stick with the prop you've got. Cruise at 38-40mph.

There does seem to be something wrong with your figures, though.

4500rpm = 40mph and 4900rpm = 48mph?

Revcounter problem/set up?

[jwalker]

Originally Posted by The Garfish

.. dis iz wot yew wud corl 10% slipp...
gaRf

[blimp]

With regard to 40mph@4500rpm and 48mph@4900rpm - them's the figures I'm getting. Might take her into the local Yam techie soon and get him to see if all is ok - rev counter and speedo and the standard pieces of kit for the engine .... and the speed figures seem to tally with the gps

Garf - we have de Euro over these parts. Punts, sadly, can now only be found on the water.

[ian mcconnell]

If your engines doing 5000 rpm then dont worry, my max rpm is 5500 but mine max's out at 5000rpm. When i spoke to steel developments i was told if i changed the pitch and achived 5500rpm it would be at the sacrifice of fuel, and that top end would not improve by much.

If you are after acceleration and torque then stick to the pitch and size you currently have.

DO get a stainless if you can though, mine (titan) apparantly has more grip and a larger surface area so more thrust.. and it looks great!